Midoriya is often a common character. Since he has a complex relationship with Bakugou, his reaction to Bakugou's expulsion can be an important part of the story. All Might might also be included as he could be a mentor figure who tries to guide Bakugou, even after his expulsion. And Bakugou's other classmates like Kirishima would likely be there too, as they are his friends and would be affected by his leaving.
One possible plotline could be Bakugou's journey to redeem himself after the expulsion. He might have to face his own flaws and work hard to prove that he can change. Another could be how his friends react to his expulsion, some might be shocked while others might try to help him get back in. Maybe there's a plotline where he discovers a new power or ability during his time away from school that makes him even stronger when he eventually returns.
His expulsion would have a huge impact on Midoriya. Since they have a long - standing rivalry, Midoriya might feel a sense of guilt, as if he could have done something to prevent Bakugou from getting expelled. He might also be more determined than ever to prove himself, now that his main rival is no longer in the school environment.
He might become more responsible. Since One for All is such a significant power, he'd have to step up. He couldn't just be as reckless as he used to be.
There's also a possibility that it's an agent of a secret organization. This organization might be aiming to disrupt the hero society, and they see Bakugou as a key figure to target. So they send one of their best shooters to take him down.
One possible plot could be that Bakugou is in the middle of a battle with villains. He's being his usual brash self, charging ahead. Suddenly, a sniper from the villains' side takes aim and shoots him. His friends then have to rush to his aid and figure out how to get him medical help while still fending off the villains.
Midoriya is very likely to be in it. He and Bakugou have a complex relationship. Midoriya could be the one who either challenges Bakugou to face his fears or is there to support him in the process. Their rivalry - turned - friendship can play a big role in Bakugou's journey of facing his fears.
Perhaps Bakugou gets expelled due to his attitude problems. He might have continuously bullied a fellow student to the point where the school can't overlook it anymore. His explosive temper could lead to him saying or doing something really offensive to a teacher or a large number of students, which would be against the school's code of conduct.
All Might would probably be one of the first to try to stop Bakugou. As Izuku's mentor and a symbol of justice in the story, he wouldn't tolerate such violence. Another could be their teacher, Aizawa. He's strict and protective of his students, so he'd surely step in.
The theme of adventure also pops up a lot. The female character and Bakugou might go on quests together or face challenges side by side. It's exciting to see how they work together, especially considering Bakugou's explosive personality. These adventures can range from battling villains to exploring new areas within their fictional world.
Love is also a major theme. The love between Bakugou and his partner is shown in different ways, especially as they are about to welcome a new life. It might be shown through his protective instincts or his caring actions. Additionally, the theme of facing the unknown is present. Bakugou, who is used to being in control, now has to deal with the uncertainties that come with pregnancy, like the health of the baby and the changes in his relationship.